diff --git a/drivers/staging/greybus/gpio-gb.c b/drivers/staging/greybus/gpio-gb.c
index 8ef00a7f477b..f2e2eeffbc1f 100644
--- a/drivers/staging/greybus/gpio-gb.c
+++ b/drivers/staging/greybus/gpio-gb.c
@@ -67,8 +67,7 @@ struct gb_gpio_line_count_response {
 struct gb_gpio_activate_request {
 	__u8	which;
 };
-struct gb_gpio_activate_response {
-};
+/* activate response has no payload */
 
 struct gb_gpio_deactivate_request {
 	__u8	which;